draw_image always results in a 300x300 image about origami HOT 2 OPEN

require 'origami'
include Origami

def add_kitty(cm_with_size)

  pdf = PDF.read('pdf-sample.pdf')
  page = pdf.get_page(1)

  img = Graphics::ImageXObject.from_image_file('1327.jpeg', 'jpg')
  img.Width  = 500
  img.Height = 422
  img.ColorSpace = Origami::Graphics::Color::Space::DEVICE_RGB
  img.BitsPerComponent = 8
  img.Interpolate = false
  page.add_xobject(img, :kitty)

  contents = Origami::ContentStream.new

  # Reimplementation of ContentStream#draw_image
  contents.instructions << PDF::Instruction.new('q')
  if cm_with_size
    contents.instructions << PDF::Instruction.new('cm', img.Width, 0, 0, img.Height, 0, 0)
  else
    contents.instructions << PDF::Instruction.new('cm', 300, 0, 0, 300, 0, 0)
  end
  contents.instructions << PDF::Instruction.new('Do', :kitty)
  contents.instructions << PDF::Instruction.new('Q')

  page.setContents([page.Contents, contents])

  pdf.save("pdf-with-kitty-#{cm_with_size ? 'cm_with_size' : 'cm_default'}.pdf")
end

add_kitty(true)
add_kitty(false)